中国电力2018，Vol.51Issue(1)：164-170,7.DOI:10.11930/j.issn.1004-9649.201706084
采用蒸发式冷却器的间接空冷系统的热经济性分析
Thermal Economic Analyses of a Power Unit Using Indirect Dry Cooling System With an Evaporative Cooler
邹庆江 1张义江 1郭民臣 2储德全2
作者信息
- 1. 神华国能蒙东能源有限公司鄂温克发电厂,内蒙古呼伦贝尔 021000
- 2. 华北电力大学能源动力与机械工程学院,北京 102206
- 折叠
摘要
Abstract
Indirect dry cooling systems are widely used in coal-fired power plants.However,high environmental temperatures affect the heat dissipation performance of the dry cooling tower,causing the increase of the back pressure of the steam turbine.In this work,the evaporative cooler operating with the dry cooling tower is adopted to reduce the circulating water temperature and the exhaust steam pressure,and improve the thermal efficiency of the power unit.Taking a 600-MW steam turbine unit as the study object,an indirect dry-cooled system with evaporative cooler is designed and a mathematical model is established.The matching characteristics of the heat load distribution between the evaporative cooler and the dry cooling tower are analyzed.The back pressure,the water consumption and the pump power consumption are analyzed for various heat loads.The results show that at the rated load,when the ratio of the water flow rate for the evaporative cooler to the total circulating water flow rate is between 0.21 and 0.31,and the generation standard coal consumption rate decreases by about 7.4 g/(kW·h).关键词
间接空冷系统/蒸发式冷却器/空冷塔/热经济性Key words
indirect dry-cooled system/evaporative cooler/cooling tower/thermal economy分类
能源科技引用本文复制引用
邹庆江,张义江,郭民臣,储德全..采用蒸发式冷却器的间接空冷系统的热经济性分析[J].中国电力,2018,51(1):164-170,7.
